C++学习之：判断系统版本

很多时候我们要根据系统的不同版本进行不同的操作，下面给出了如何判断Windows操作系统的版本函数，希望对大家有所帮助。

int VRVGetSystemVersion(SYSTEM_VERSION *pnSystemVersion)
{
    OSVERSIONINFO osvi;
    BOOL bOsVersionInfoEx;

    *pnSystemVersion = ENUM_SYSTEM_UNKOWN;

    memset(&osvi, 0, sizeof(OSVERSIONINFO));
    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);

    if (!(bOsVersionInfoEx = GetVersionEx((OSVERSIONINFO *) &osvi)) )
    {
        osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
        if (! GetVersionEx( (OSVERSIONINFO *) &osvi) )
        {
            return FALSE;
        }
    }

    switch (osvi.dwPlatformId)
    {
        case VER_PLATFORM_WIN32_NT:
            if (osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 0)
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_VISTA;
            }

            if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 2)
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_SER_2003;
            }

            if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1)
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_XP;
            }

            if (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0)
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_2000;
            }

            if ( osvi.dwMajorVersion <= 4)
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_NT;
            }

            if (osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 1)
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_7;
            }
            break;
        case VER_PLATFORM_WIN32_WINDOWS:
            if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 0 )
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_95;
            }

            if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 10)
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_98;
            }

            if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 90)
            {
                *pnSystemVersion = ENUM_SYSTEM_WIN_ME;
            }

            break;
        default:
            *pnSystemVersion = ENUM_SYSTEM_UNKOWN;
            break;

    }
    return TRUE;
}